WO2010127354A1 - Key blank identification system with bitting analysis - Google Patents

Key blank identification system with bitting analysis Download PDF

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Publication number
WO2010127354A1
WO2010127354A1 PCT/US2010/033421 US2010033421W WO2010127354A1 WO 2010127354 A1 WO2010127354 A1 WO 2010127354A1 US 2010033421 W US2010033421 W US 2010033421W WO 2010127354 A1 WO2010127354 A1 WO 2010127354A1
Authority
WO
WIPO (PCT)
Prior art keywords
key
bitting
identification system
blank
master
Prior art date
Application number
PCT/US2010/033421
Other languages
English (en)
French (fr)
Inventor
Chester O. D. Thompson
William R. Mutch
Randall A. Porras
Original Assignee
Hy-Ko Products
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hy-Ko Products filed Critical Hy-Ko Products
Priority to MX2011011630A priority Critical patent/MX2011011630A/es
Priority to CN201080024163.3A priority patent/CN102448636B/zh
Priority to EP10770489.2A priority patent/EP2424690A4/de
Publication of WO2010127354A1 publication Critical patent/WO2010127354A1/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V20/00—Scenes; Scene-specific elements
    • G06V20/60—Type of objects
    • G06V20/66—Trinkets, e.g. shirt buttons or jewellery items
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B23C3/28—Grooving workpieces
    • B23C3/35—Milling grooves in keys
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/22—Measuring arrangements characterised by the use of optical techniques for measuring depth
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00—Pattern recognition
    • G06F18/20—Analysing
    • G06F18/22—Matching criteria, e.g. proximity measures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/40—Extraction of image or video features
    • G06V10/46—Descriptors for shape, contour or point-related descriptors, e.g. scale invariant feature transform [SIFT] or bags of words [BoW]; Salient regional features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2235/00—Details of milling keys
    • B23C2235/12—Using a database to store details of the key, the information in the database being used for the generation of the profile of the key
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2235/00—Details of milling keys
    • B23C2235/41—Scanning systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30084—Milling with regulation of operation by templet, card, or other replaceable information supply
    • Y10T409/300952—Milling with regulation of operation by templet, card, or other replaceable information supply to cut lock key
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30084—Milling with regulation of operation by templet, card, or other replaceable information supply
    • Y10T409/300952—Milling with regulation of operation by templet, card, or other replaceable information supply to cut lock key
    • Y10T409/301008—Using templet other than a key
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30084—Milling with regulation of operation by templet, card, or other replaceable information supply
    • Y10T409/300952—Milling with regulation of operation by templet, card, or other replaceable information supply to cut lock key
    • Y10T409/301064—Complete cycle

Definitions

  • This invention relates generally to the field of systems for identifying objects and, more particularly to systems for utilizing a means for identifying key blanks that are functionally compatible with an unknown key.
  • Identifying the correct key blank for use in duplication involves selecting a blank from hundreds or even thousands of possibilities, where differences between key blanks may be very subtle. These hard- to-notice subtleties significantly increase the level of difficulty for all operators of such key replication systems, both inexperienced trainees and experts alike.
  • a key blank Once a key blank is chosen, it goes through a cutting process.
  • the typical cutting process simply traces the profile of the master key onto the key blank, such that the key blank will exactly match (within the error limits and accuracy of the tracing machine) the original master key.
  • a mechanically linked cutting wheel actually cuts into the key blank while it mimics the movement of the tracer as the tracer moves longitudinally along the profile of the master key. If the incorrect key blank is provided during this process, the key blank being formed into the duplicate key may not possess the correct longitudinal length, thereby causing a failure.
  • the entire process of selecting a key blank for replication and then mechanically cutting the key must begin again. Worse still, if the blank has the proper length but does not possess the appropriate thickness, contour, groove or other traits, the failure may not be discovered until the key is actually inserted into the lock.
  • ⁇ 2145769 easy-to-use key blank identification system that increases the accuracy and efficiency of key replication.
  • a key identification system comprises a sensing device configured to determine information and characteristics of a master key, and a logic to analyze the information and characteristics of the master key.
  • the sensing device may be configured to capture information about the bittings of the master key.
  • the logic analyzes information about the bittings and compares it with bitting characteristics of known key blanks to determine the likelihood of a match between the master key and the known key blanks.
  • the system configured to extract bitting information may comprise an imaging system, such as a camera or other imaging device.
  • the camera may capture an image, such as a digital image, of the bittings of the master key to be analyzed by the logic.
  • FIG 1. illustrates a master key
  • FIG. illustrates an embodiment of the key ID system.
  • FIG. 3 illustrates an example comparison chart between a TR47 master key and TR47 key data.
  • FIG. 4 illustrates an example comparison chart between a KWl master key and KWl key data
  • FIG. 5 illustrates an example comparison chart between a KWl master key and SCl key data.
  • FIG. 6 illustrates an example comparison chart between a KWl master key and AM3 key data.
  • a system for identifying a key blank (“key ID system”) and method for identifying a key blank are provided.
  • the key ID system analyzes a master key to be duplicated, such as a house key, car key or other key, and determines the appropriate key blank to be used.
  • the system and method described herein may be used independently to determine a proper key blank, or may be used in conjunction with other systems to narrow the field of prospective key blanks.
  • existing key identification systems may be modified or retrofitted to implement some or all features described herein.
  • the master key 10 may include standard key features such as a head 16 and a blade 18.
  • the blade 18 may connect at one end to the head 16 with the tip 14 at the opposing end.
  • the master key 10 may include teeth or bittings 12 cut into the blade.
  • the bittings 12 consist of notches cut in the blade 18 to interface with the tumblers of a corresponding lock.
  • the bittings 12 must match up with the lock's unique tumbler configuration in order to activate and turn the lock.
  • the key ID system may analyze the master key 10 to determine certain physical characteristics of the key 10. Based on these characteristics, the key ID system may then determine the proper key blank to be used to duplicate the master key 10.
  • the key ID system may include a sensing device or system to extract bittings information from a master key 10.
  • the sensing system may sense and capture parameters of the bittings 12.
  • the sensing system may include any mechanical, electronic or optical sensors, sensors, imaging devices or other tools known in the art for extracting physical characteristics of a key or similar object.
  • the sensing system for extracting bittings information from the master key 10 includes an imaging system to scan and analyze the physical characteristics of the master key 10.
  • the imaging system may be a laser imaging system, an optical imaging system, a photo imaging system, or any other imaging system known in the art.
  • the imaging system may scan the master key or capture an image of the master key to determine characteristics of the key that are unique to a specific key blank.
  • other known methods or devices such as electrical, mechanical, or optical sensors, may be used in place of or in conjunction with the imaging system to determine the traits and characteristics of the master key geometry.
  • the imaging system includes one or more cameras 20 configured to capture an image, such as digital images, of the master key 10.
  • the camera 20 may specifically be positioned to capture an image of the blade 18 and bittings 12.
  • the camera 20 may be positioned perpendicular to the blade 18. Alternatively, the camera 20 may positioned at an angle or at other position to capture the desired image
  • the imaging system may further include other components to aid in capturing images of the master key 10, such as one or more lights 24 and mirrors.
  • the lights 24 may be positioned to enhance the clarity and quality of the image recorded by the imaging system.
  • the light 24 may be positioned to provide backlighting for the key.
  • the mirrors may be positioned to allow a camera in a first position to record an image of the key from a second position.
  • the mirrors may further allow a single camera to record multiple images of the master key from different angles, thereby increasing the amount of information related to the master key recorded by a single camera
  • the image system may include one or more reflectors 26.
  • the reflector 26 may be positioned to direct light to a desired location.
  • a reflector may be positioned underneath the key 10 and facing the light 24.
  • the reflector 26 may be angled, such as tilted upwards, to direct light from the light 24 to the underside of the key 10, thereby providing backlighting of the key 10. It will be appreciated, however, that the light 24 and reflector 26 may be arranged in any configuration to optimize or clarify the image of the key 10.
  • the key ID system may include a key holder 22 to hold the master key 10.
  • the key holder may be any device capable of holding or supporting a master key 10.
  • the key holder 22 may comprise a lower support and an upper door to close onto the key 10.
  • the key holder may alternatively comprise a clamp, gripper, platform, suspension, or any other device configured to hold the master key 10.
  • the key ID system may analyze characteristics of the master key's teeth or bittings 12. Because the bittings 12 are configured to match up with the corresponding lock's unique tumbler configuration, various characteristics of the bittings 12 are often unique to certain types of key blanks. For example, certain key manufacturers may use distinct bitting patterns, or a set of unique bitting patterns, for their locks or for a group of locks. Additionally, certain types of keys, such as house keys or car keys, may use a different bittings configuration than other types of keys. By analyzing the master key bittings 12 and comparing them to bitting configurations used with known key blanks, the field of prospective matching key blanks may be greatly reduced.
  • the key ID system may include a logic to analyze bitting characteristic information captured by the key ID system.
  • the term "logic” includes but is not limited to a software, a firmware, an executable program, a hardware or hard-wired circuit, or combinations thereof.
  • a logic may include a software controlled microprocessor, discrete logic like an application specific integrated circuit (ASIC), an analog circuit, a digital circuit, a programmed logic device, a memory device containing instructions, or the like.
  • Logic may include one or more gates, combinations of gates, or other circuit components. Logic may also be fully embodied as software. Where multiple logics are described, it may be possible to incorporate the multiple logics into one physical logic. Similarly, where a single logic is described, it may be possible to distribute that single logic between multiple physical logics.
  • the logic may be configured to determine a correlation or likelihood of a match between a known key blank and the master key 10.
  • the logic may include a database to store key related information ("key data").
  • the key data may include characteristics of known key blanks, such as length, shape, bitting information, size, shape and location of key grooves, and other geometric and physical characteristics of known key blanks.
  • the database may be integral with the logic, in communication with the logic, or remotely accessible to the logic.
  • the database may associate key data with specific key blanks or with types or groups of key blanks.
  • the database may associate key data with specific key manufacturers or different types of keys such as house keys or car keys.
  • the key ID system may access the database to compare scanned characteristics of the master key with the stored key data in the database. Key blanks that do not have characteristics consistent with those of the master key may be then ruled out as possible matches for
  • the key ID system may scan the master key 10 at one or more angles and compare the scanned data with stored key data.
  • the database stores key data related to bittings used with known key blanks.
  • key bittings are represented as a numeric bitting code that contains information as to how a key is to be cut by a locksmith.
  • the bitting code is a series of integers (e.g. 372164) that may be translated or decoded from a key code chart or bitting code list.
  • the database may store data related to known key bitting patterns other than numeric bitting codes. For example, the database may store measurements of bitting geometries used with known key blanks.
  • Stored bitting geometries may include bitting spacings, notch depths, blade width, and bitting flat width.
  • Spacing data may relate to the location or spacing between of each bitting notch along the length of the key blade 18. Spacing data may be measured from the center of each notch to a specific reference point, such as the tip 14 or shoulder of the blade 18. Depth data may relate to the depth of each bitting notch and may be measured as the distance between a reference edge, such as the back side or center line of the blade 18, and the notch surface.
  • Blade width may relate to the width of the blade surface to be cut.
  • Bitting flat width may relate to the width of each notch surface and may be measured as the distance across the bottom of the notch.
  • the logic may determine bitting parameters of the master key 10 by analyzing an image captured by an imaging system.
  • the bitting parameters may be compared to bitting data in the database to determine if the master key 10 matches a key blank or blanks in the database. As shown in FIGS. 3-6, bitting
  • parameters of the master key such as spacing and depth, may be analyzed at various preselected points, such as at the bitting notches.
  • the master key bitting parameters may then be compared to bitting data in the database. If the bitting parameters of the master key match the bitting data of a key blank in the database, then that key blank may be appropriate for duplicating the master key. For example, if each bitting depth of a master key 10 is very close to an allowable bitting depth for a given key blank, then the key blank may be a match. Likewise, if the bitting flat width and spacing of the bittings of a master key 10 are close to allowable bitting flat widths and spacings for a given key blank, then the key blank may be a match. However, if the bitting data of the master key is not close to allowable data for a given key blank, then the given key blank or blanks may be ruled out as a possible match.
  • the database may associate bitting data with various key-related identifiers.
  • bitting data may be directly associated with specific key blanks, it may also be associated with groups of keys, such as keys made by a specific key manufacturer or certain types of keys. Accordingly, large groups of potential key blanks may be ruled out if a bitting parameter of the master key does not match a bitting parameter shared by the group of keys.
  • the bitting positions can be analyzed in any number of methods.
  • One embodiment includes first determining the pattern of the unknown subject key. Each stored pattern may then be tested against the subject key. The test may involve checking each of the known spacing positions for the stored pattern and seeing if there is a bitting at that position. To accomplish this, the logic may analyze or measure the slope or angle with respect to the length of the blade 18 of the master key pattern near the sample position and determining if there is a "flat" in that position.
  • a flat could be defined as a small segment of the pattern (0.020" wide for example) with a slope or
  • ⁇ 2145769 ⁇ 10 angle that is close to 0 degrees, (less than 17 degrees for example) that is either centered, just left or right of, the target spacing position. If a flat is identified, then the depth of the flat can also be identified from the subject key pattern relative to the reference axis.
  • the key ID system may set tolerance ranges for each bitting parameter measurement.
  • the comparison values In order for a key blank to match a master key, the comparison values must fall within the predetermined tolerance range. For example, as illustrated in the test results window of FIGS. 3-6, the tolerance range for bitting depth may be set to plus or minus six thousandths of an inch. In order for the master key to match a key blank, each depth measurement comparison must fall within this range. As shown in FIGS. 3 and 4, the comparison values are all between -1 and +1, indicating a match between the master key and the tested key blank or blanks. FIGS. 5 and 6, however, illustrate comparison values of greater than 6, indicating that the master key does not match the tested key blank or blanks.
  • the pass/fail limits could be based on a set range, a set percentage of the depth offsets of the target key, or some other parameter.
  • the limits may be set the same for all keys or may be individualized on a key-by-key basis.
  • the pattern matching algorithms may be repeated while shifting the data by small increments (0.020" for example) in either or both directions. For example, if a key blank was slightly miscut and the spacing was shifted from the nominal position, the search may fail at the nominal position but may identify the pattern shifted slightly over from the nominal position.
  • the spacing and depth evaluations may be measured using a scoring system of 0 to 100%, where 0 is considered to be an impossible match and 100 is a perfect match. The total bitting score is then the product of the combined spacing and depth scores.
  • the logic may compare the bittings of a master key 10 to key data related to a key blank in the database and evaluate a series of preset spacing point for the given key blank. For example, the geometry of the master key 10 may be analyzed at each spacing point. A score may be given to each spacing point based on the flatness of the bitting 12 at the spacing point and a measurement of the variation or slope of the bitting 12 relative to the database depths. The relationships between angles can be varied to achieve optimal results. The flatter the area near the spacing point, the higher the score. For example, zero degrees (or flat) might represent a score of 100 and 45 degrees might represent 0.
  • the logic may analyze the depth of the blade at each spacing point give a score to the spacing point based on the variation from one of the valid depths for the given key blank stored in the database. For example, no variation might represent a score of 100 and 2X the differences between depths might represent a score of 0.
  • the logic may compute this evaluation for each of the spacing points and then compute a total by averaging all the points. This entire process may be repeated with a slight shift towards the head 16 of the key 10 and again with a shift towards the tip 14 of the key 10. This will compensate for a key 10 that has a slight spacing shift. The best of the three totals are used in the final results for the bitting evaluation.
  • the logic may determine the centers of each of the flats on the bittings 12 of the master key 10. Because the center of a flat that is on the peak of a bitting may be skewed due to the depth of the bitting on the left and right, the logic may ignore
  • the logic may also ignore ridges because the center of flats that are on ridges may be skewed due to the depth and height of the bittings 12 on either side. However, flats that are located in "valleys," or between bittings of lesser depth, are often properly centered regardless of what is on either side. For each identified valley, the logic may compare the nearest database spacing position and a score is given. A total spacing score is then computed based on the average score for each of the valleys.
  • the database is not limited to bittings data.
  • the database may store information related to other identifying parameters of the key.
  • the key ID system may utilize other key parameters, in combination with bittings information, to narrow the field of possible key blanks.
  • the key ID system as described may be used in conjunction with other known key identification systems.
  • the key ID system may be used in conjunction with user interface identification systems, such as the object identification system disclosed in U.S. Publication No. 2004/0095380 and the key duplication system disclosed in U.S. Publication No. 2007/0224008, each of which are hereby incorporated by reference in their entirety.
PCT/US2010/033421 2009-05-01 2010-05-03 Key blank identification system with bitting analysis WO2010127354A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
MX2011011630A MX2011011630A (es) 2009-05-01 2010-05-03 Sistema de identificación de llave en blanco con análisis de dientes.
CN201080024163.3A CN102448636B (zh) 2009-05-01 2010-05-03 具有齿分析的钥匙原坯识别系统
EP10770489.2A EP2424690A4 (de) 2009-05-01 2010-05-03 Schlüsselrohlingsidentifikationssystem mit bartanalyse

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US21512209P 2009-05-01 2009-05-01
US61/215,122 2009-05-01
US27564809P 2009-09-01 2009-09-01
US61/275,648 2009-09-01

Publications (1)

Publication Number Publication Date
WO2010127354A1 true WO2010127354A1 (en) 2010-11-04

Family

ID=43030394

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/033421 WO2010127354A1 (en) 2009-05-01 2010-05-03 Key blank identification system with bitting analysis

Country Status (5)

Country Link
US (3) US8634655B2 (de)
EP (1) EP2424690A4 (de)
CN (1) CN102448636B (de)
MX (1) MX2011011630A (de)
WO (1) WO2010127354A1 (de)

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US9582734B2 (en) 2017-02-28
US8634655B2 (en) 2014-01-21
CN102448636B (zh) 2014-09-10
MX2011011630A (es) 2012-09-28
US20140140628A1 (en) 2014-05-22
US20170193327A1 (en) 2017-07-06
US20100278438A1 (en) 2010-11-04
EP2424690A1 (de) 2012-03-07
EP2424690A4 (de) 2013-11-27
CN102448636A (zh) 2012-05-09

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